WO2016189763A1 - Dispositif de soufflage et dispositif de nettoyage - Google Patents

Dispositif de soufflage et dispositif de nettoyage Download PDF

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Publication number
WO2016189763A1
WO2016189763A1 PCT/JP2015/080702 JP2015080702W WO2016189763A1 WO 2016189763 A1 WO2016189763 A1 WO 2016189763A1 JP 2015080702 W JP2015080702 W JP 2015080702W WO 2016189763 A1 WO2016189763 A1 WO 2016189763A1
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WO
WIPO (PCT)
Prior art keywords
flow path
exhaust
stator
impeller
core back
Prior art date
Application number
PCT/JP2015/080702
Other languages
English (en)
Japanese (ja)
Inventor
早光亮介
澤田知良
塩沢和彦
Original Assignee
日本電産株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産株式会社 filed Critical 日本電産株式会社
Priority to EP15893395.2A priority Critical patent/EP3306105A4/fr
Priority to JP2017520203A priority patent/JPWO2016189763A1/ja
Priority to US15/576,338 priority patent/US20180163747A1/en
Priority to CN201580080499.4A priority patent/CN107614891B/zh
Publication of WO2016189763A1 publication Critical patent/WO2016189763A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L5/00—Structural features of suction cleaners
    • A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
    • A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/28—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means
    • A47L9/2836—Installation of the electric equipment, e.g. adaptation or attachment to the suction cleaner; Controlling suction cleaners by electric means characterised by the parts which are controlled
    • A47L9/2842—Suction motors or blowers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle

Definitions

  • the present invention relates to a blower and a vacuum cleaner.
  • Patent Document 1 A blower device for a vacuum cleaner in which cooling efficiency is improved by passing exhaust gas through a motor is known.
  • An object of one aspect of the present invention is to provide a blower that efficiently cools a motor and enhances exhaust efficiency.
  • An air blower includes a rotor having a shaft disposed along a central axis extending vertically, a stator positioned radially outside the rotor, the rotor, and the stator.
  • a cylindrical housing extending in the axial direction, and an impeller attached to the shaft above the stator, the stator having an annular core back portion and a diameter from the core back portion
  • a plurality of teeth extending inward in the direction, an insulator covering at least a portion of the teeth, a coil wound around each of the teeth via the insulator, and at least a portion of which is more than the core back portion
  • a flow path forming member located on the radially inner side, and the housing has a through-hole opened on the inner side, and the flow path shape
  • the member connects a part of the insulator or the coil on one side in the circumferential direction and a part of the insulator or the coil on the other side in the circumferential direction, and has a flow path passing radially
  • FIG. 1 is a perspective view showing a blower according to the present embodiment.
  • Drawing 2 is a sectional view showing the air blower of an embodiment.
  • FIG. 3 is an exploded perspective view of the air blower according to the embodiment.
  • FIG. 4 is a perspective view of the motor according to the embodiment as viewed from below.
  • FIG. 5 is a perspective view of the stator according to the embodiment.
  • FIG. 6 is an exploded perspective view showing a stator, a sensor substrate, and a lower lid.
  • FIG. 7 is a plan sectional view of the blower.
  • FIG. 8 is an explanatory view showing a mounting mode of the rotation sensor.
  • FIG. 9 is a partial cross-sectional perspective view of the exhaust guide member.
  • FIG. 1 is a perspective view showing a blower according to the present embodiment.
  • Drawing 2 is a sectional view showing the air blower of an embodiment.
  • FIG. 3 is an exploded perspective view of the air blower according to the embodiment.
  • FIG. 4
  • FIG. 10 is a partially enlarged cross-sectional view showing a first guiding path of the blower device of the present embodiment.
  • FIG. 11 is a partially enlarged cross-sectional view showing a second guide path of the blower device of the present embodiment.
  • FIG. 12 is a plan view of the impeller rotor blades.
  • FIG. 13 is a side view showing the blower of the present embodiment.
  • FIG. 14 is a cross-sectional view showing the exhaust guide hole (flow path) of the present embodiment.
  • FIG. 15 is a cross-sectional view showing another example of the exhaust guide hole (flow path).
  • FIG. 16 is a plan cross-sectional view of the air blower of the first modification.
  • FIG. 11 is a partially enlarged cross-sectional view showing a second guide path of the blower device of the present embodiment.
  • FIG. 12 is a plan view of the impeller rotor blades.
  • FIG. 13 is a side view showing the blower of the present embodiment.
  • FIG. 14
  • FIG. 17 is a vertical cross-sectional view of a blower device (centrifugal blower) of Modification 2.
  • FIG. 18 is a top view of a stator of Modification 2.
  • FIG. 19 is a top view of the core piece of the second modification.
  • FIG. 20 is a cross-sectional view of another example of the air blower of Modification 2 according to FIG.
  • FIG. 21 is a perspective view of a vacuum cleaner having a blower.
  • an XYZ coordinate system is appropriately shown as a three-dimensional orthogonal coordinate system.
  • the Z-axis direction is a direction parallel to the axial direction of the central axis J shown in FIG.
  • the Y-axis direction is a direction orthogonal to the Z-axis direction and is the left-right direction in FIG.
  • the X-axis direction is a direction orthogonal to both the Y-axis direction and the Z-axis direction.
  • the direction in which the central axis J extends is the up-down direction.
  • the positive side (+ Z side) in the Z-axis direction is referred to as “upper side (upper axial direction)”
  • the negative side ( ⁇ Z side) in the Z-axis direction is referred to as “lower side (lower axial direction)”.
  • the up-down direction, the upper side, and the lower side are names used for explanation only, and do not limit the actual positional relationship and direction.
  • a direction parallel to the central axis J (Z-axis direction) is simply referred to as an “axial direction”
  • a radial direction around the central axis J is simply referred to as a “radial direction”.
  • the circumferential direction centered on is simply referred to as the “circumferential direction”.
  • FIG. 1 is a perspective view of the blower device 1 of the present embodiment.
  • FIG. 2 is a cross-sectional view showing the blower 1 of the present embodiment.
  • FIG. 3 is an exploded perspective view of the blower device 1 of the present embodiment excluding the control board 11 and the board case 15.
  • the air blower 1 includes a motor 10, an impeller 70, an exhaust guide member 60, an impeller housing 80, a control board 11, and a board case 15. Since the motor 10 includes the rotor 30 and the stator 40 as will be described later, the blower device 1 includes the rotor 30, the stator 40, the housing 20, and the impeller 70. An exhaust induction member 60 is attached to the upper side (+ Z side) of the motor 10.
  • the impeller housing 80 is attached to the upper side of the exhaust guide member 60.
  • the impeller 70 is accommodated between the exhaust guide member 60 and the impeller housing 80.
  • the impeller 70 is attached to the motor 10 so as to be rotatable around the central axis J.
  • a control board 11 and a board case 15 that covers the control board 11 are attached to the lower side ( ⁇ Z side) of the motor 10.
  • FIG. 4 is a perspective view of the motor 10 of this embodiment as viewed from below. 2 and 4, the motor 10 includes a housing 20, a lower lid 22, a rotor 30 having a shaft 31, a stator 40, a sensor substrate 50, a lower bearing 52a and an upper bearing 52b. Is provided.
  • the housing 20 is a covered cylindrical container that houses the rotor 30 and the stator 40. More specifically, the housing 20 has a cylindrical shape extending in the axial direction and accommodates the rotor 30 and the stator 40.
  • the housing 20 includes a cylindrical peripheral wall 21, an upper lid portion 23 positioned at the upper end of the peripheral wall 21, and an upper bearing holding portion 27 positioned at the center of the upper lid portion 23.
  • a stator 40 is fixed to the inner surface of the housing 20.
  • the upper bearing holding portion 27 has a cylindrical shape that protrudes upward from the center portion of the upper lid portion 23.
  • the upper bearing holding part 27 holds the upper bearing 52b inside.
  • a plurality of through holes 25 and 26 are provided in the edge portion 21 a between the peripheral wall 21 and the upper lid portion 23 of the housing 20.
  • the housing 20 has through holes 25 and 26 that open to the inside.
  • the three through holes 25 and the three through holes 26 are alternately positioned around the axis (see FIG. 7).
  • the through holes 25 and 26 reach the outer edge portion of the upper lid portion 23 from the upper side of the peripheral wall 21.
  • the through holes 25 and 26 penetrate in the radial direction in the peripheral wall 21. Further, the through holes 25 and 26 penetrate in the vertical direction in the vicinity of the radially outer edge portion of the upper lid portion.
  • a lower lid 22 is attached to the lower ( ⁇ Z side) opening of the housing 20.
  • a cylindrical lower bearing holding portion 22 c that protrudes downward from the lower surface of the lower lid 22 is provided at the center of the lower lid 22.
  • the lower bearing holding portion 22c holds the lower bearing 52a.
  • the lower lid 22 is provided with arc-shaped through holes 22a having a radial width at three locations around the axis.
  • three cutout portions 22 b obtained by cutting out the outer peripheral portion of the lower lid 22 in a straight line are provided.
  • a gap between the lower opening end 20 a of the housing 20 and the notch 22 b is a lower opening 24 of the motor 10.
  • the rotor 30 includes a shaft 31, a rotor magnet 33, a lower magnet fixing member 32, and an upper magnet fixing member 34. That is, the rotor 30 has a shaft 31.
  • the rotor magnet 33 has a cylindrical shape that surrounds the shaft 31 radially around the axis ( ⁇ z direction).
  • the lower magnet fixing member 32 and the upper magnet fixing member 34 have a cylindrical shape having a diameter equivalent to that of the rotor magnet 33.
  • the lower magnet fixing member 32 and the upper magnet fixing member 34 are attached to the shaft 31 by sandwiching the rotor magnet 33 from both sides in the axial direction.
  • the upper magnet fixing member 34 has a small-diameter portion 34a having a smaller diameter than the lower side (the rotor magnet 33 side) at the upper portion in the central axis direction.
  • the shaft 31 is disposed along a central axis J extending vertically.
  • the shaft 31 is supported by the lower bearing 52a and the upper bearing 52b so as to be rotatable around the axis ( ⁇ z direction).
  • An impeller 70 is attached to the upper end (+ Z side) of the shaft 31.
  • the impeller 70 is integrated with the shaft 31 and rotates around the axis.
  • FIG. 5 is a perspective view of the stator 40 of the present embodiment.
  • FIG. 6 is an exploded perspective view showing the stator 40, the sensor substrate 50, and the lower lid 22.
  • FIG. 7 is a plan sectional view of the motor 10.
  • the stator 40 is located on the radially outer side of the rotor 30.
  • the stator 40 surrounds the rotor 30 around the axis ( ⁇ z direction).
  • the stator 40 includes a stator core 41, a plurality (three) of upper insulators 43, a plurality (three) of lower insulators 44, and a coil 42.
  • the stator core 41 has a core back portion 41a and a plurality of teeth portions 41b. Further, as shown in FIG.
  • the stator 40 includes a mold part (flow path forming member) 47 in which the coil 42 is embedded. That is, the stator 40 includes a core back portion 41a, a teeth portion 41b, an insulator, a coil 42, and a flow path forming member.
  • the insulator corresponds to the upper insulator 43 and the lower insulator 44.
  • the flow path forming member corresponds to the mold part 47.
  • the stator core 41 has an annular core back part 41a and a plurality (three) of teeth parts 41b extending radially inward from the core back part 41a.
  • the core back portion 41a has a ring shape around the central axis.
  • the core back portion 41a has a configuration in which three linear portions 41c and three arc portions 41d are alternately positioned around the axis.
  • Each of the tooth portions 41b extends radially inward from the inner peripheral surface of the linear portion 41c.
  • the teeth 41b are arranged at equal intervals in the circumferential direction.
  • On the upper surface of the arc portion 41d of the core back portion 41a an inclined member 46 that guides the exhaust to the inside of the stator 40 is disposed.
  • the inclined member 46 has a shape in which the thickness is reduced from the radially outer side toward the inner side.
  • the insulator (the upper insulator 43 and the lower insulator 44) covers at least a part of the tooth portion 41b. Moreover, the coil 42 is wound around each teeth part 41b via the insulator (the upper insulator 43 and the lower insulator 44).
  • the upper insulator 43 is an insulating member that covers a part of the upper surface and side surfaces of the stator core 41.
  • the upper insulator 43 is provided corresponding to each of the three tooth portions 41b.
  • the upper insulator 43 includes an upper outer peripheral wall 43a positioned above the core back portion 41a, an upper inner peripheral wall 43e positioned above the tip of the tooth portion 41b, an upper outer peripheral wall 43a and an upper inner peripheral wall 43e. Are connected in the radial direction, and an upper insulating portion 43d located above the portion of the tooth portion 41b around which the coil 42 is wound.
  • the lower insulator 44 is an insulating member that covers a part of the lower surface and side surface of the stator core 41.
  • the lower insulator 44 is provided corresponding to each of the three tooth portions 41b.
  • the lower insulator 44 includes a lower outer peripheral wall portion 44a positioned below the core back portion 41a, a lower inner peripheral wall portion 44c positioned below the tip of the tooth portion 41b, and a lower outer peripheral wall portion 44a.
  • the lower inner peripheral wall portion 44c is connected in the radial direction, and the lower insulating portion 44b is provided on the lower side of the portion around which the coil 42 of the tooth portion 41b is wound.
  • the upper insulator 43 and the lower insulator 44 are arranged so as to sandwich the teeth portion 41b of the stator core 41 in the vertical direction.
  • the coil 42 is wound around the tooth portion 41 b covered with the upper insulating portion 43 d of the upper insulator 43 and the lower insulating portion 44 b of the lower insulator 44.
  • the three upper outer peripheral wall portions 43a located on the core back portion 41a of the stator core 41 surround the coil 42 from the radially outer side on the upper side of the stator core 41.
  • the upper outer peripheral wall 43a has a first side end face 43b and a second side end face 43c at both ends in the circumferential direction.
  • the first side end surface 43b is an inclined surface that is inclined with respect to the radial direction and faces radially outward.
  • the second side end surface 43c is an inclined surface that is inclined with respect to the radial direction and faces inward in the radial direction.
  • a flat surface 43f and an upper inclined convex portion 43g are provided side by side in the circumferential direction on a portion located on the straight portion 41c.
  • the flat surface 43f is located on the second side end surface 43c side
  • the upper inclined convex portion 43g is located on the first side end surface 43b side.
  • An arcuate surface disposed along the inner peripheral surface of the housing 20 is provided between the flat surface 43f and the second side end surface 43c.
  • the outer peripheral surface of the upper inclined convex portion 43 g is an arc-shaped surface along the inner peripheral surface of the housing 20.
  • the flat surface 43f extends in the axial direction aligned with the outer peripheral surface of the linear portion 41c of the stator core 41.
  • the upper inclined convex portion 43g protrudes radially outward with respect to the flat surface 43f.
  • the upper inclined convex portion 43g protrudes downward in the axial direction and covers a part of the straight portion 41c of the stator core 41 from the radially outer side.
  • an axially flat surface 43j and an upper guide inclined surface 43h located below the axially flat surface 43j are provided on the side surface adjacent to the flat surface 43f of the upper inclined convex portion 43g.
  • the upper guide inclined surface 43h is gradually inclined in the direction toward the lower side as going downward.
  • the axially flat surface 43j and the upper guide inclined surface 43h are smoothly connected.
  • the inclination direction of the upper guide inclined surface 43h is the same as the rotation direction of the impeller.
  • the upper outer peripheral wall portions 43a adjacent in the circumferential direction are separated from each other by a predetermined interval.
  • the first side end face 43b of one upper outer peripheral wall 43a and the second side end face 43c of the other upper outer peripheral wall 43a are arranged facing each other in the circumferential direction.
  • the inclination degree with respect to the radial direction of the first side end face 43b is different from the inclination degree with respect to the radial direction of the second side end face 43c.
  • the circumferential width of the opening 90 on the radially outer side of the gap CL formed between the adjacent upper outer peripheral wall portions 43a is narrower than the circumferential width of the opening 91 on the radially inner side. .
  • An inclined member 46 disposed on the core back portion 41a is positioned below the gap CL (see FIG. 6).
  • the inclined member 46 is sandwiched between the first side end face 43b and the second side end face 43c.
  • the gap CL is located inside the through hole 26 of the housing 20.
  • the through hole 26 and the gap CL serve as an air flow path that guides exhaust flowing from the outside of the housing 20 to the inside of the stator 40.
  • An inclination direction (a direction from the outer side in the radial direction toward the inner side) of the gap CL as viewed from above coincides with a circulation direction in the circumferential direction of the exhaust discharged from the exhaust guiding member 60. That is, it coincides with the rotation direction of the impeller 70.
  • the three lower outer peripheral wall portions 44a located on the lower side of the core back portion 41a surround the coil 42 on the lower side of the stator core 41 from the radially outer side. Although there is a gap between the lower outer peripheral wall portions 44a adjacent to each other in the circumferential direction, the lower outer peripheral wall portions 44a may be in contact with each other in the circumferential direction.
  • a flat surface 44d and a lower inclined convex portion 44g are provided side by side in the circumferential direction at a portion located below the straight portion 41c of the core back portion 41a.
  • Arc-shaped surfaces arranged along the inner peripheral surface of the housing 20 are provided on both sides in the circumferential direction of the region where the flat surface 44d and the lower inclined convex portion 44g are provided.
  • the flat surface 44d extends in the axial direction aligned with the outer peripheral surface of the linear portion 41c.
  • the lower inclined convex portion 44g protrudes radially outward with respect to the flat surface 44d. Further, the lower inclined convex portion 44 g protrudes upward in the axial direction and partially covers the straight portion 41 c of the stator core 41.
  • An axially flat surface 44j and a lower guiding inclined surface 44h positioned above the axially flat surface 44j are provided on the side surface adjacent to the flat surface 44d of the lower inclined convex portion 44g.
  • the lower guide inclined surface 44h is gradually inclined in an upward direction as it goes upward.
  • the axially flat surface 44j and the lower guide inclined surface 44h are smoothly connected.
  • the inclination direction of the lower guide inclined surface 44h is the same as the rotation direction of the impeller.
  • the lower inclined convex portion 44g of the lower insulator 44 and the upper inclined convex portion 43g of the upper insulator 43 are arranged so as to be shifted in the circumferential direction and the axial direction via a gap.
  • the lower guide inclined surface 44h and the upper guide inclined surface 43h face each other through a gap.
  • a gap between the lower guide inclined surface 44 h and the upper guide inclined surface 43 h becomes an air flow path FP between the stator 40 and the housing 20.
  • the swirl component of the exhaust gas flowing through the air flow path FP is smoothly directed downward by the lower guide inclined surface 44h and the upper guide inclined surface 43h. Thereby, the exhaust efficiency of the exhaust which flows through the air flow path FP can be improved.
  • a plurality (two in the drawing) of plate-like portions 45 extending in the axial direction are provided on the flat surface 44d.
  • the plate-like portion 45 stands substantially perpendicular to the flat surface 44d.
  • the distal end on the radially outer side of the plate-like portion 45 reaches the inner peripheral surface of the housing 20.
  • the plate-like portion 45 divides a region between the lower outer peripheral wall portion 44a and the housing 20 into a plurality of regions in the circumferential direction.
  • the mold part 47 functions as a flow path forming member. That is, the mold part 47 constitutes an exhaust guide hole 48 as a flow path. At least a part of the mold part 47 is located inside the core back part 41a in the radial direction. As shown in FIG. 5, the mold part 47 is formed by embedding a region surrounded by the upper outer peripheral wall part 43 a of the upper insulator 43 and the lower outer peripheral wall part 44 a of the lower insulator 44 in the stator 40. Thereby, the mold part 47 covers the coil 42. The mold part 47 is located between the upper insulators 43 adjacent to each other, between the lower insulators 44, and between the coils 42.
  • the mold part 47 connects a part of the insulator or coil on one side in the circumferential direction and the part of the insulator or coil on the other side in the circumferential direction. In this way, the mold portion 47 is supported inside the motor 10.
  • the mold part 47 extends from the upper end of the upper insulator 43 to the lower end of the lower insulator 44 along the axial direction. Further, the mold part 47 is provided with a through hole 47a for allowing the rotor 30 to pass therethrough.
  • the mold part 47 surrounds and firmly supports the coil 42 and integrally holds the upper insulator 43, the lower insulator 44, the stator core 41, and the sensor substrate 50. Thereby, the mold part 47 can reduce vibration generated from the stator 40.
  • the resin material constituting the mold part 47 is not limited as long as it has insulating properties and can embed the coil 42. Moreover, the mold part 47 may be comprised from the hot-melt material with low melting
  • the mold part 47 On the outer peripheral surface of the mold part 47, three concave groove-shaped exhaust guide holes (flow paths) 48 extending from the upper side to the lower end are provided.
  • the groove-shaped exhaust guide hole 48 is covered from the radially outer side by the core back part 41a of the stator core 41 in the middle in the vertical direction. That is, the exhaust guide hole 48 passes through the inner side in the radial direction of the core back portion 41a. Further, at least part of the radially inner side surface of the core back portion 41 a is exposed to the exhaust guide hole 48. Thereby, the core back part 41a can be cooled efficiently.
  • the exhaust guide hole 48 may expose part of the winding of the coil 42, the upper insulator 43, and the lower insulator 44. As shown in FIG.
  • the exhaust guide hole 48 opens radially outward at an upper opening 48a located on the upper side of the core back portion 41a.
  • the exhaust guide hole 48 has an inclined surface 48c that smoothly inclines downward on the radially inner side of the upper opening 48a.
  • the exhaust guide hole 48 is opened downward by a lower opening 48 b located at the lower end surface of the mold part 47.
  • the lower opening 48 b is located immediately above the through hole 22 a of the lower lid 22. That is, the mold part 47 has an upper opening 48a that opens on the upper side of the core back part 41a, and a lower opening 48b that opens on the lower side of the core back part 41a.
  • the upper opening 48a opens outward in the radial direction.
  • the lower opening 48b opens toward the lower side in the axial direction. Accordingly, the air directed downward in the axial direction can be discharged to the outside of the housing 20 without changing the direction of the airflow by the exhaust guide holes 48 formed in the axial direction.
  • the exhaust guide hole 48 connects the upper opening 48a and the lower opening 48b. Thus, air can be efficiently guided by the exhaust guide hole 48 and the inside of the stator 40 can be cooled.
  • the upper opening 48 a of the exhaust guide hole 48 faces the three gaps CL between the first side end surface 43 b and the second side end surface 43 c of the upper insulator 43.
  • the gap CL is connected to the through hole 26 of the housing 20. Therefore, the exhaust guide hole 48 is connected to the through hole 26 of the housing 20. Thereby, the air flow path can be formed inside the core back portion 41a, and the inside of the stator 40 can be efficiently cooled.
  • the width of the exhaust guide hole 48 matches the width of the opening 91 located on the radially inner side of the gap CL. Further, as shown in FIG. 2, the exhaust guide hole 48 opens from the outer peripheral surface of the mold portion 47 and extends downward.
  • the mold portion 47 has a first inclined surface 48d and a second inclined surface 48e that constitute both side walls in the width direction of the exhaust guide hole 48.
  • the first inclined surface 48 d is continuously connected to the first side end surface 43 b of the upper insulator 43. That is, the first inclined surface 48d is located on the front side in the rotational direction of the impeller 70 with respect to the radial direction as it goes inward in the radial direction.
  • the second inclined surface 48 e is continuously connected to the second side end surface 43 c of the upper insulator 43.
  • the 2nd inclined surface 48e is located in the rotation direction front side of the impeller 70 with respect to radial direction as it goes to radial direction inner side. Therefore, the mold part 47 has an inclined surface located on the front side in the rotational direction of the impeller 70 with respect to the radial direction as it goes radially inward in the upper opening 48a.
  • the inclined surfaces correspond to the first inclined surface 48d and the second inclined surface 48e.
  • the exhaust gas has a swirl component toward the front in the rotation direction of the impeller 70. Therefore, by providing the first inclined surface 48d and the second inclined surface 48e inclined in the rotation direction as side walls constituting the exhaust guide hole 48. Exhaust efficiency can be increased.
  • the exhaust discharged from the gap CL to the inside in the radial direction of the stator 40 is introduced into the exhaust guide hole 48 from the upper opening 48a, and the flow direction is directed downward along the inclined surface 48c. Further, the exhaust passes through the inside of the exhaust guide hole 48 and is discharged to the lower side of the stator 40 through the lower opening 48b.
  • a member provided with the exhaust guide hole 48 may be disposed between the coils 42.
  • the lower opening 48 b has a shape in which the cross-sectional area of the flow path increases toward the lower side. With this configuration, air passing through the exhaust guide hole 48 flows more smoothly downward, so that exhaust efficiency can be improved.
  • FIG. 14 is a cross-sectional view of the exhaust guide hole 48 taken along the line XIV-XIV shown in FIG.
  • the mold part 47 has a straight part 48 f and a taper part 48 h positioned vertically as side walls constituting the exhaust guide hole 48.
  • the tapered portion 48h is located below the straight portion 48f. Further, a boundary portion 48g is provided between the straight portion 48f and the tapered portion 48h.
  • the straight portion 48f forms a straight wall surface along the vertical direction. Therefore, in the straight portion 48f, the cross-sectional area of the exhaust guide hole 48 does not change along the vertical direction.
  • the tapered portion 48h is inclined with respect to the vertical direction so that opposing wall surfaces are separated from each other as it goes downward.
  • the mold part 47 has the taper part 48h in which the flow path cross-sectional area of the exhaust guide hole 48 increases from the upper side to the lower side.
  • FIG. 15 is a cross-sectional view of another example of the exhaust guide hole 148 that can be employed in the present embodiment.
  • FIG. 15 is a cross-sectional view corresponding to FIG.
  • the exhaust guide hole 148 shown in FIG. 15 has the same configuration as the above-described exhaust guide hole 48 except for a cross-sectional shape along the vertical direction.
  • the mold part 47 has a first taper part 148 f and a second taper part 148 h positioned vertically as side walls constituting the exhaust guide hole 148.
  • the second taper portion 148h is located below the first taper portion 148f.
  • a boundary portion 148g is provided between the first taper portion 148f and the second taper portion 148h.
  • the first taper portion 148f is inclined with respect to the vertical direction so that opposing wall surfaces approach each other as it goes downward. Therefore, in the first taper portion 148f, the flow passage cross-sectional area of the exhaust guide hole 148 decreases from the upper side to the lower side. That is, the mold part 47 has a first taper part 148f that reduces the flow passage cross-sectional area of the exhaust guide hole 148 from the upper side to the lower side.
  • the second taper portion 148h is inclined with respect to the vertical direction so that the opposing wall surfaces are separated from each other toward the lower side. Therefore, in the second taper portion 148h, the exhaust cross-sectional area of the exhaust guide hole 148 increases from the upper side to the lower side.
  • the mold part 47 has a second taper part 148h located below the first taper part 148f and having a flow passage cross-sectional area of the exhaust guide hole 148 that increases from the upper side to the lower side.
  • Such an exhaust guide hole 148 is narrowest at the boundary portion 148g.
  • the air that has flowed into the exhaust guide hole 148 increases the flow resistance at the first taper portion 148f and is narrowed down, and then passes through the boundary portion 148g and flows into the second taper portion 148h.
  • the air that has flowed into the second tapered portion 148h gradually increases in cross-sectional area as it goes downward. As a result, the pressure of the air is gradually released, the flow gradually becomes gentle, and the air is discharged without causing separation. Thereby, ventilation efficiency improves.
  • the sensor substrate 50 is disposed between the stator 40 and the lower lid 22 as shown in FIGS.
  • the sensor substrate 50 includes a circular ring-shaped main body 50a and three protrusions 50b that protrude outward in an oblique direction with respect to the radial direction from the outer peripheral edge of the main body 50a.
  • the main body 50a has a through hole through which the shaft 31 is inserted.
  • the sensor substrate 50 is fixed to the lower insulator 44.
  • At least three rotation sensors 51 are mounted on the sensor substrate 50.
  • the rotation sensor 51 is, for example, a hall element.
  • the sensor substrate 50 may be electrically connected to the coil 42.
  • a drive circuit that outputs a drive signal to the coil 42 may be mounted on the sensor substrate 50.
  • FIG. 8 is an explanatory diagram showing how the rotation sensor 51 is mounted.
  • the rotation sensor 51 is disposed between the tips of the lower inner peripheral wall portions 44 c adjacent in the circumferential direction.
  • the three rotation sensors 51 are arranged at equal intervals of 120 ° in the circumferential direction.
  • the radially inner surface of the rotation sensor 51 faces the rotor magnet 33.
  • the rotor magnet 33 is disposed in the central portion of the rotor 30 in the axial direction. Therefore, the rotation sensor 51 is connected to the sensor substrate 50 by a lead 51 a having a length corresponding to the axial length from the sensor substrate 50 to the rotor magnet 33.
  • a mechanism for supporting the rotation sensor 51 may be provided at the tip of the lower inner peripheral wall 44c.
  • a recess for inserting the rotation sensor 51 can be provided, and the movement of the rotation sensor 51 in the radial direction can be suppressed.
  • the rotation sensor 51 may be fixed to the lower inner peripheral wall 44c by snap fitting or the like.
  • the lower lid 22 is attached to the open end 20 a of the housing 20 that houses the stator 40 and the sensor substrate 50. As shown in FIG. 2, at least a part of the three through holes 22 a of the lower lid 22 is located on the radially outer side of the outer peripheral end of the main body 50 a of the sensor substrate 50.
  • the through hole 22 a serves as a second exhaust port 97 that exhausts the exhaust gas that has passed through the exhaust guide hole 48 of the mold portion 47 to the lower side of the motor 10.
  • the cutout portion 22b on the outer periphery of the lower lid 22 is disposed so as to substantially coincide with the straight portion 41c of the stator core 41, the flat surface 43f of the upper insulator 43, and the flat surface 44d of the lower insulator 44 when viewed in the axial direction.
  • the lower opening 24 on the lower surface of the motor 10 serves as a first exhaust port 96 that exhausts the exhaust gas that has passed through the air flow path FP between the stator 40 and the housing 20.
  • FIG. 9 is a partial cross-sectional perspective view of the exhaust guide member 60 as viewed from below.
  • 10 and 11 are enlarged cross-sectional views showing a part of the impeller 70, the exhaust guide member 60, and the impeller housing 80.
  • FIG. 10 shows a first guiding path D1 described in the subsequent stage
  • FIG. 11 shows a second guiding path D2 described in the subsequent stage.
  • the exhaust induction member 60 is attached to the housing 20 of the motor 10.
  • the exhaust guide member 60 includes a disk ring-shaped support 66a, an annular protrusion 66c that protrudes upward from the outer periphery of the support 66a, and a cylindrical partition that extends downward from the outer periphery of the support 66a.
  • the ring 66b includes an outer peripheral cylindrical portion 65 that surrounds the partition ring 66b from the outside in the radial direction, and a plurality (six in the drawing) of inner guide portions 67 that extend downward from the lower end of the outer peripheral cylindrical portion 65.
  • the support 66a has a cylindrical mounting ring 68 extending downward from the lower surface of the central portion, and three columnar protrusions 69 protruding downward from the lower surface of the support 66a.
  • the three cylindrical protrusions 69 have the same diameter and height, and are arranged at equal intervals of 120 ° in the circumferential direction.
  • the cylindrical convex portion 69 is hollow, and has a through hole 69b penetrating in the axial direction at the center of the lower end surface 69a.
  • the upper bearing holding portion 27 of the housing 20 is inserted into the mounting ring 68 of the exhaust induction member 60.
  • the lower surface of the mounting ring 68 of the exhaust guide member 60 and the lower end surface 69 a of the cylindrical convex portion 69 are in contact with the upper surface of the upper lid portion 23 of the housing 20.
  • the exhaust induction member 60 and the motor 10 are fastened by a bolt BT inserted through the through hole 69b of the cylindrical convex portion 69 and the screw hole 23a of the upper lid portion 23.
  • the partition ring 66b and the outer peripheral cylindrical portion 65 are opposed to each other in the radial direction.
  • the gap between the partition ring 66b and the outer peripheral cylinder portion 65 constitutes a first guide path D1 that guides exhaust gas into the motor 10 and a second guide path D2 that discharges exhaust gas to the outer periphery of the motor 10.
  • the first guiding path D1 is located at a location where the inner guiding part 67 is provided, and the second guiding path D2 is located between the circumferential directions of the inner guiding parts 67.
  • six first guide paths D1 and two second guide paths D2 are provided along the circumferential direction.
  • the plurality of inward guiding portions 67 are fitted in the through hole 25 or the through hole 26 of the housing 20, respectively.
  • the outer peripheral surface of the inward guide portion 67 extends in the axial direction aligned with the outer peripheral surface of the outer peripheral cylindrical portion 65.
  • the inner peripheral surface 67b of the inward guiding portion 67 is an inclined surface that is inclined radially inward as it goes downward.
  • the inside of the inner peripheral surface 67b of the inner guide portion 67 guides the exhaust discharged from the impeller 70 as the first guide path D1 to the through holes 25 and 26 on the radially inner side.
  • a plurality of stationary blades 67a extending in a rib shape in the vertical direction are provided on the inner peripheral surface 67b of the inner guiding portion 67.
  • the stationary blade 67a connects the partition ring 66b and the inward guide portion 67 in the radial direction.
  • the exhaust gas passing through the first guiding path D1 is rectified between the stationary blades 67a and efficiently guided to the through holes 25 and 26.
  • the stationary blade 67a may be inclined in the rotation direction of the impeller 70. In this case, exhaust including a swirl component in the rotation direction of the impeller 70 can be guided to the through holes 25 and 26 more efficiently.
  • a second guide path D ⁇ b> 2 that guides the exhaust discharged from the impeller 70 radially outward and discharges it to the outside of the motor 10 is between the circumferential directions of the inner guide portions 67. Is provided. As shown in FIG. 11, the second guide path D ⁇ b> 2 is located between the outer peripheral surface 66 e of the partition ring 66 b and the inner peripheral surface 65 a of the outer peripheral cylindrical portion 65.
  • a third exhaust port 95 is provided at the lower end of the second guide path D2. The third exhaust port 95 discharges the exhaust gas that has passed through the second guide path D ⁇ b> 2 to the outside of the motor 10 downward. This exhaust gas flows between the outer peripheral surface of the motor 10 and the inner peripheral surface 19a of the casing 19 that houses the motor 10, and is finally exhausted from a final exhaust port 17b (see FIG. 2) described later.
  • the outer peripheral surface 66e of the partition ring 66b has an inner inclined portion 66d that protrudes radially outward as it goes downward.
  • the inner peripheral surface 65a of the outer peripheral cylindrical portion 65 has an outer inclined portion 65b that reduces the thickness of the outer peripheral cylindrical portion 65 at the lower end.
  • the impeller 70 is attached to the shaft 31 above the stator 40.
  • the impeller 70 discharges the fluid sucked from the intake port 70a opened on the upper side toward the outside in the radial direction through the internal flow path.
  • the impeller 70 includes an impeller body 71 and an impeller hub 72.
  • the impeller main body 71 includes a base portion 73, a plurality of moving blades 74, and a shroud 75.
  • the base portion 73 has a disc shape and has a through hole 73a penetrating in the axial direction at the center portion.
  • the periphery of the through hole 73a of the base portion 73 is a conical inclined surface portion 73b projecting upward.
  • the rotor blades 74 are plate-like members that are curved in the circumferential direction and extend from the inner side to the outer side in the radial direction on the upper surface of the base portion 73.
  • the moving blades 74 are arranged upright along the axial direction.
  • the shroud 75 has a cylindrical shape that is tapered toward the upper side in the axial direction.
  • the central opening of the shroud 75 is the air inlet 70 a of the impeller 70.
  • the base portion 73 and the shroud 75 are connected by a moving blade 74.
  • FIG. 12 is a plan view of the rotor blade 74 of the impeller 70.
  • a plurality of rotor blades 74 as shown in FIG. 12, is disposed along the upper surface of the base portion 73 in the circumferential direction (theta Z direction). As shown in FIG. 2, the moving blade 74 stands vertically from the upper surface of the base portion 73 along the axial direction.
  • three types of moving blades 74 are arranged at equal intervals along the circumferential direction in the same type.
  • a plurality of (three) first blades 74a, a plurality (three) second blades 74b, and a plurality (six) third blades are used.
  • 74c is included.
  • the three first rotor blades 74a are arranged at equal intervals of 120 ° in the circumferential direction.
  • the 2nd moving blade 74b is arrange
  • the three second rotor blades 74b are also arranged at equal intervals of 120 ° in the circumferential direction.
  • the third moving blade 74c is disposed at an intermediate position between the first moving blade 74a and the second moving blade 74b adjacent in the circumferential direction.
  • the six third rotor blades 74c are arranged at equal intervals every 60 ° in the circumferential direction.
  • the moving blade 74 extends with a curvature on the upper surface of the base portion 73 in a plan view (XY view). One end of the moving blade 74 is located on the outer peripheral edge of the base portion 73. The other end of the moving blade 74 is located radially inward from the outer peripheral edge of the base portion 73.
  • the radially outer ends of the first moving blade 74a, the second moving blade 74b, and the third moving blade 74c are all located on the outer peripheral edge of the base portion 73.
  • the end P1 on the inner peripheral side of the first moving blade 74a is located closest to the center of the base 73.
  • the inner peripheral end P2 of the second moving blade 74b is located on the radially outer side than the end P1 of the first moving blade 74a.
  • the inner peripheral end P3 of the third moving blade 74c is located further radially outward than the end P2 of the second moving blade 74b.
  • the first moving blade 74a, the second moving blade 74b, and the third moving blade 74c all have a curved shape that is bowed in the counterclockwise direction.
  • the first moving blade 74a is composed of four arcs having different radii of curvature.
  • the convex blade surface 74d of the first moving blade 74a has three inflection points CP11, CP12, CP13 in the length direction.
  • the second moving blade 74b is composed of three arcs having different radii of curvature.
  • the convex blade surface 74e of the second moving blade 74b has two inflection points CP21 and CP22 in the length direction.
  • the third rotor blade 74c is composed of two arcs having different radii of curvature.
  • the convex blade surface 74f of the third moving blade 74c has one inflection point CP31 in the length direction.
  • the inflection point CP11 of the first moving blade 74a, the inflection point CP21 of the second moving blade 74b, and the inflection point CP31 of the third moving blade 74c are the same in the base portion 73. It arrange
  • the inflection point CP12 of the first moving blade 74a, the inflection point CP22 of the second moving blade 74b, and the end P3 of the third moving blade 74c are the same radial position C2 in the base portion 73. Placed on top. Further, the radius of curvature of the portion between the radial position C1 and the radial position C2 of the first moving blade 74a, the radius of curvature of the portion between the radial position C1 and the radial position C2 of the second moving blade 74b, The curvature radii of the portion between the radial position C1 and the radial position C2 of the third rotor blade 74c coincide with each other.
  • the inflection point CP13 of the first moving blade 74a and the end P2 of the second moving blade 74b are disposed on the same radial position C3 in the base portion 73.
  • the radius of curvature of the portion between the radial position C2 and the radial position C3 of the first moving blade 74a and the radius of curvature of the portion between the radial position C2 and the radial position C3 of the second moving blade 74b are as follows: Match each other.
  • the radii of curvature of the blade surfaces 74d to 74f are different for each radial region of the impeller 70.
  • portions belonging to the same radial region are set to the same radius of curvature.
  • the radial position C3 coincides with the intake port 80a of the impeller housing 80 when viewed from the axial direction. Therefore, only the portion on the inner peripheral side of the inflection point CP13 of the first moving blade 74a is disposed inside the intake port 80a.
  • the impeller hub 72 includes a cylindrical portion 72a extending in the axial direction, a disk-shaped flange portion 72b extending radially outward from a lower portion of the outer peripheral surface of the cylindrical portion 72a, and a plurality of convex portions 72c protruding upward from the upper surface of the flange portion 72b. And having.
  • the cylindrical portion 72a has a tapered slope portion 72d that is tapered at the upper end portion.
  • the impeller hub 72 is attached to the impeller main body 71 by inserting the cylindrical portion 72a into the through hole 73a of the base portion 73 from below.
  • the cylinder part 72a may be press-fitted into the through hole 73a, or may be fixed using an adhesive or the like.
  • the flange portion 72b of the impeller hub 72 supports the impeller body 71 from below.
  • the convex portion 72 c on the flange portion 72 b fits into the concave portion 73 c on the lower surface of the base portion 73.
  • the impeller hub 72 includes the flange portion 72b, the impeller body 71 can be supported from below by a flange portion 72b over a wide radial range. Thereby, the impeller 70 can be stably held, and the stability during high-speed rotation is increased.
  • the inclined surface portion 72d at the tip of the cylindrical portion 72a of the impeller hub 72 and the inclined surface portion 73b of the base portion 73 are smoothly connected in the vertical direction.
  • the inclined surface portion 72d and the inclined surface portion 73b constitute an annular inclined surface 70b that guides the fluid sucked from the intake port 70a of the impeller 70 radially outward.
  • the length of the cylindrical portion 72a (the inclined surface portion 72d) can be increased without increasing the inclined surface portion 73b of the base portion 73.
  • the maximum height of the annular slope 70b can be increased. Therefore, it is possible to realize an annular inclined surface 70b having a preferable shape while suppressing an increase in the thickness of the base portion 73.
  • the impeller hub 72 is preferably made of metal. Thereby, the shaft 31 and the impeller 70 can be firmly connected. Therefore, the impeller 70 can be stably rotated at a high speed. Moreover, since the slope part 72d can be made into a metal surface, the surface of the upper end of the annular slope 70b can be smoothed.
  • the impeller 70 is fixed to the shaft 31 by fitting the upper end portion of the shaft 31 into the cylindrical portion 72a of the impeller hub 72 from below. As shown in FIG. 2, the impeller 70 connected to the shaft 31 is disposed inside the annular protrusion 66 c of the exhaust guide member 60. Therefore, the protrusion 66 c is located in the vicinity of the exhaust port 70 c of the impeller 70.
  • the projecting portion 66c guides the exhaust discharged from the impeller 70 downward together with the exhaust guide portion 83 of the impeller housing 80 described later.
  • the outer peripheral surface of the protrusion 66c is an inclined surface that is inclined downward as it goes radially outward.
  • the outer peripheral surface of the projecting portion 66c has a smooth curved surface that is convex outward.
  • the lower end of the outer peripheral surface of the protrusion 66c is smoothly continuous with the outer peripheral surface of the cylindrical partition ring 66b. Therefore, the inclination angle with respect to the direction perpendicular to the axial direction is approximately 90 ° at the lower end of the protrusion 66c.
  • the upper end of the protruding portion 66 c is located immediately outside the outer peripheral end of the base portion 73 of the impeller 70 in the radial direction.
  • the upper end of the protruding portion 66 c is located above the lower surface of the base portion 73, and is located below the upper surface of the outer peripheral end of the base portion 73.
  • the protrusion 66c has the shape and arrangement described above, so that the air discharged from the impeller 70 can be smoothly guided downward without disturbing the flow.
  • air is released from the outer peripheral end of the base portion 73 in a direction substantially perpendicular to the axial direction.
  • the released air is guided along the outer peripheral surface of the projecting portion 66c without colliding with the projecting portion 66c. The Thereby, air can be conveyed efficiently.
  • the impeller housing 80 has an intake port 80a on the upper side and has a cylindrical shape that is tapered toward the upper side in the axial direction.
  • the impeller housing 80 has a skirt shape from the outer peripheral edge of the impeller housing main body 82 to the outer side and the lower side in the radial direction, an intake guide portion 81 positioned at the opening end of the intake port 80a, an impeller housing main body 82 that houses the impeller 70 And an outer peripheral attachment ring 84 extending upward from the outer peripheral edge of the exhaust guide portion 83.
  • the impeller housing main body 82 has a cross-sectional shape that follows the shroud 75 of the impeller 70.
  • the inner side surface (lower surface) of the impeller housing main body 82 faces the outer side surface (upper surface) of the shroud 75 at a uniform interval.
  • An annular intake guide portion 81 protruding inward in the radial direction is located at the upper end portion on the inner peripheral side of the impeller housing main body portion 82. As shown in FIG. 10, the intake guide portion 81 covers the upper end surface 75 b of the shroud 75 from the upper side. A narrow gap extending in the radial direction exists between the lower surface of the intake guide portion 81 and the upper end surface 75 b of the shroud 75.
  • the outer peripheral end of the impeller housing main body 82 is provided with a peripheral bent portion 82a that is bent by turning the outer peripheral end of the shroud 75 downward.
  • the peripheral bent portion 82a extends downward and surrounds the outer end surface of the shroud 75 from the radially outer side. Between the inner peripheral surface of the peripheral bent portion 82a and the outer end surface of the shroud 75, there is a narrow gap extending upward in the axial direction.
  • the exhaust guide portion 83 constitutes an exhaust passage 92 that guides the exhaust discharged radially outward from the impeller 70 downward.
  • the inner circumferential surface of the exhaust guide portion 83 is smoothly inclined from the direction perpendicular to the axial direction toward the axial direction from the upper end to the lower end.
  • the inner peripheral surface of the exhaust guide portion 83 is gently connected to the inner peripheral surface 65a of the outer peripheral cylindrical portion 65 of the exhaust guide member 60 at the lower end to constitute a wall surface on the outer peripheral side of the exhaust passage 92.
  • the outer peripheral mounting ring 84 has a cylindrical shape.
  • the outer peripheral mounting ring 84 has a flange portion 84a extending radially outward from the upper end.
  • the outer peripheral surface of the outer peripheral mounting ring 84 is fitted with the inner peripheral surface of the outer peripheral cylindrical portion 65 of the exhaust guide member 60. Further, the flange portion 84 a comes into contact with the upper end of the outer peripheral cylindrical portion 65 and determines the position of the impeller housing 80 in the vertical direction with respect to the exhaust guide member 60.
  • a concave portion 86 extending in the circumferential direction is provided on the upper surface of the exhaust guide portion 83.
  • the concave portion 86 is constituted by a peripheral bent portion 82a, an exhaust guide portion 83, and an outer peripheral mounting ring 84.
  • the impeller housing 80 is provided with a concave portion 86 so that the thickness of the exhaust guide portion 83 is uniform.
  • the recess 86 is provided with a rib 85 that connects the outer peripheral mounting ring 84 and the peripheral bent portion 82a of the impeller housing main body 82 in the radial direction.
  • the impeller housing 80 is produced by mold molding. That is, the impeller housing 80 is manufactured by injecting and solidifying a fluidized material into a gap between two or more molds.
  • the impeller housing 80 of the present embodiment is made of a resin material and is manufactured by injection molding. Further, when the impeller housing 80 is made of an aluminum alloy, the impeller housing 80 is manufactured by aluminum die casting. Molded products manufactured by mold molding may cause sinking on the surface of the thick wall portion due to shrinkage when the material is solidified, which may reduce dimensional accuracy. Further, when aluminum die casting is performed, there is a risk that pores (nests) are formed inside the thick portion and the strength is lowered. In the impeller housing 80 of the present embodiment, a recess 86 is provided between the outer peripheral mounting ring 84 and the peripheral bent portion 82a of the impeller housing body 82.
  • the impeller housing 80 can suppress the occurrence of sink marks around the exhaust guide portion 83 by making the thickness of the exhaust guide portion 83 uniform. Similarly, the impeller housing 80 can suppress the formation of pores in the exhaust guide portion 83. Furthermore, the impeller housing 80 of the present embodiment can increase the rigidity of the outer peripheral mounting ring 84 with respect to the impeller housing main body 82 by providing the recess 85 with the rib 85. Thereby, the impeller housing 80 can be firmly fixed to the exhaust guide member 60 in the outer peripheral mounting ring 84.
  • the board case 15 is attached to the lower side of the motor 10 and surrounds the control board 11.
  • the substrate case 15 includes a disk-shaped bottom wall 16 and a cylindrical portion 17 extending upward from the outer edge of the bottom wall 16.
  • the cylindrical portion 17 is provided with a final exhaust port 17b that penetrates in the radial direction and communicates the inside and the outside of the substrate case 15.
  • the final exhaust port 17b joins and discharges the exhaust discharged from the above-described exhaust ports (first exhaust port 96, second exhaust port 97, and third exhaust port 95).
  • FIG. 13 is a side view of the motor 10.
  • the upper end surface 17 a of the cylindrical portion 17 is inclined in a spiral shape around the central axis J.
  • the upper end surface 17a is inclined in the same direction as the rotation direction of the impeller 70 as it goes downward.
  • a final exhaust port 17b is located on the lower spiral side of the upper end surface 17a.
  • the exhaust discharged from the third exhaust port 95 of the exhaust guide member 60 flows downward between the outer peripheral surface of the motor 10 and the inner peripheral surface 19 a of the housing 19 that houses the motor 10.
  • the exhaust reaches the upper end surface 17a of the cylindrical portion 17, it reaches the final exhaust port 17b while being swung along the inclination of the upper end surface 17a and is discharged. Since the upper end surface 17a guides the exhaust gas including the swirling component that is discharged obliquely downward from the third exhaust port 95 to the final exhaust port 17b without changing the flow direction at a steep angle, the exhaust efficiency is reduced. Can be reduced.
  • the third exhaust port 95 is located immediately above the final exhaust port 17b.
  • the third exhaust port 95 positioned immediately above the final exhaust port 17b is referred to as a directly upper exhaust port 95A.
  • the uppermost end 17 c of the upper end surface 17 a is located below the inward guide portion 67.
  • the discharge efficiency from 95A can be increased.
  • the upper end surface 17a of the present embodiment is illustrated as an example of an inclined surface having a constant inclination along the circumferential direction.
  • the upper end surface 17a may be an inclined surface whose inclination changes along the circumferential direction.
  • the upper end surface 17a may be a curved surface that protrudes downward, and the curved surface formed by the upper end surface may be a curved surface that is located above the upper end surface 17a.
  • the control board 11 is connected to a coil wire extending from the coil 42 and the sensor board 50 and controls the motor 10. As shown in FIG. 2, the control board 11 is disposed under the motor 10 while being inclined with respect to the lower lid 22 via a plurality of (three in this embodiment) columnar members 13 fixed to the lower lid 22. Is attached to the side. The columnar member 13 is screwed into the screw hole 22 d of the lower lid 22. The plurality of columnar members 13 have different heights. An inclined surface is provided on the lower end surface of the columnar member 13. The control board 11 is screwed to the lower end surface of the columnar member 13 via a spacer 13a.
  • the control board 11 is inclined toward the final exhaust port 17 b of the board case 15 inside the board case 15. That is, the lowest point of the control board 11 is located on the final exhaust port 17b side. Exhaust gas that passes through the inside of the motor 10 and is discharged to the lower side of the motor 10 from the first exhaust port 96 and the second exhaust port 97 hits the control board 11 and cools the control board 11. Further, the exhaust that hits the upper surface 11 a of the control board 11 is smoothly discharged to the final exhaust port 17 b along the inclination of the control board 11. In other words, the exhaust efficiency can be increased because the control board 11 is inclined toward the final exhaust port 17b.
  • control board 11 is disposed at an inclination, the projection area when the control board 11 is viewed from the axial direction is reduced. Thereby, the clearance gap between the outer edge of the control board 11 and the internal peripheral surface of the cylindrical part 17 of the board
  • FIG. Therefore, even when a mounting component with a large calorific value such as a capacitor is mounted on the lower surface 11b of the control board 11, these can be effectively cooled.
  • the position of the control board 11 in the axial direction is preferably arranged close to the upper surface 11a of the control board 11 and a mounting component mounted on the upper surface 11a so as not to interfere with the lower lid 22 of the motor 10.
  • the blower device 1 of the present embodiment rotates the impeller 70 by the motor 10 to draw air into the impeller 70 from the air inlet 80 a, and has a diameter via the air flow path in the impeller 70. Release air outward in the direction.
  • the exhaust discharged from the impeller 70 passes through the exhaust passage 92 and flows into the exhaust guide member 60.
  • the exhaust passage 92 is located between the inner peripheral surface of the exhaust guide portion 83 of the impeller housing 80 and the outer peripheral surface of the protrusion 66c, and directs the exhaust discharged from the impeller 70 toward the radially outer side downward.
  • Exhaust gas flowing downward through the exhaust flow path 92 branches and flows into the first guide path D1 and the second guide path D2 that are alternately arranged in the circumferential direction in the exhaust guide member 60.
  • the exhaust gas passing through the first guiding path D1 is guided radially inward by the inner peripheral surface 67b of the inner guiding portion 67 and rectified by the stationary blade 67a to be passed through the through hole 25, 26 flows into the motor 10.
  • the exhaust gas flows downward.
  • the upper inclined convex portion 43g of the upper insulator 43 and the lower inclined convex portion 44g of the lower insulator 44 direct the exhaust swirl component downward.
  • the outer peripheral surface of the straight portion 41c (stator core 41) is exposed and cooled by exhaust.
  • a plurality of plate-like portions 45 are located in the air flow path FP and rectifies the exhaust gas flowing through the air flow path FP.
  • the exhaust gas flowing through the air flow path FP is discharged downward from the lower opening 24 as the first exhaust port 96.
  • the first side end surface 43b, the second side end surface 43c and the inclined member 46 surrounding the gap CL guide the exhaust gas passing through the gap CL to the exhaust guide hole 48 of the mold portion 47.
  • exhaust can be efficiently guided downward by the exhaust guide hole 48 of the mold part 47.
  • the exhaust discharged downward from the exhaust guide hole 48 is discharged downward from the through hole 22a serving as the second exhaust port 97.
  • the exhaust discharged from the first exhaust port 96 and the second exhaust port 97 hits the upper surface 11a of the control substrate 11 fixed in an inclined manner, thereby cooling the control substrate 11. Further, the air is guided and discharged along the upper surface 11 a of the control substrate 11 toward the final exhaust port 17 b of the substrate case 15.
  • the exhaust gas passing through the second guide path D2 is moved downward through the third exhaust port 95 while moving radially outward by the inner inclined portion 66d of the partition ring 66b. Released.
  • the exhaust discharged downward from the third exhaust port 95 flows downward along the outer peripheral surface of the housing 20 of the motor 10.
  • a part of the exhaust gas flowing along the outer peripheral surface of the housing 20 turns spirally along the upper end surface 17 a of the substrate case 15 and is guided and discharged to the final exhaust port 17 b.
  • the exhaust gas including the component discharged from the third exhaust port 95 and swirling in the rotation direction of the impeller 70 is discharged on the outer peripheral surface of the motor 10. And can be efficiently guided to the final exhaust port 17b. Further, a part of the exhaust flowing along the outer peripheral surface of the housing 20 reaches the final exhaust port 17b through a shorter distance than being guided to the upper end surface 17a without being passed through the upper end surface 17a and is discharged. .
  • the stator 340 of the blower 301 has a plurality (three) of hollow members (flow path forming members) 347.
  • the hollow member 347 has a U-shape in which a cross section in a plane orthogonal to the central axis opens radially outward, and the inside of the U-shape is hollow.
  • the hollow member 347 is located on the radially inner side of the core back portion 41a.
  • the hollow member 347 is located between the coils 42 arranged in the circumferential direction.
  • the hollow member 347 constitutes an exhaust guide hole (flow path) 348 extending in the vertical direction inside the core back portion 41a in the radial direction.
  • the hollow member 347 of this modification is disposed by inserting a pre-molded resin member between the coils 42 arranged in the circumferential direction. According to this modification, the hollow member 347 can easily configure the exhaust guide hole 348 extending in the axial direction. Thereby, the air blower 301 can cool the inside of the motor 10 via the hollow member 347, and can improve exhaust efficiency.
  • FIG. 17 is a longitudinal sectional view of a centrifugal blower (blower device) 1001 of the second modification.
  • the centrifugal blower 1001 is a turbo centrifugal fan that sucks upward air from an intake hole provided in an upper portion and discharges the air downward.
  • a turbo centrifugal fan is more efficient and has less noise than a sirocco centrifugal fan.
  • the centrifugal blower 1001 of this modification is provided in, for example, a canister type vacuum cleaner, and is used for generating a suction force in the vacuum cleaner.
  • the centrifugal blower of the present invention may be used for applications other than the vacuum cleaner.
  • it is installed in other blower devices such as range hood fans and air supply and exhaust devices used for building ducts, home appliances, medical devices, industrial large equipment, etc., and performs intake and exhaust Also good.
  • the centrifugal blower 1001 includes a motor 1011, an impeller 1012, and a blower casing 1013.
  • a rotating portion (rotor) 1030 and an impeller 1012 (described later) of the motor 1011 rotate about the central axis 1009.
  • the motor 1011 has a rotating part (rotor) 1030 and a stationary part 1020.
  • the stationary part 1020 has a stator 1021.
  • the blower casing 1013 has a lower casing (housing) 1135. That is, the centrifugal blower 1001 includes a rotor 30, a stator 40, a lower casing (housing) 1135, and an impeller 1012.
  • the lower casing 1135 accommodates the rotating part 1030 and the stationary part 1020.
  • a central casing 1134 is located above the lower casing 1135.
  • the lower casing 1135 has a cylindrical shape that extends in the axial direction and opens upward. That is, the lower casing 1135 has a through hole that penetrates in the vertical direction on the upper side and opens inward. The through hole of the lower casing 1135 is connected to a gap 1090 described later.
  • the motor 1011 is an inner rotor type brushless DC motor.
  • the motor 1011 has a stationary part 1020 and a rotating part (rotor) 1030.
  • the stationary part 1020 is relatively stationary with respect to the blower casing 1013.
  • the rotating part 1030 is supported so as to be rotatable about the central axis 1009 with respect to the stationary part 1020.
  • the stationary part 1020 includes a stator 1021, a motor cover 1022, a bottom plate 1023, a circuit board 1024, an upper bearing 1025, and a lower bearing 1026.
  • the rotating unit 1030 has a shaft 1031 and a rotor 1032.
  • the stator 1021 generates magnetic flux according to the drive current supplied from the circuit board 1024.
  • the stator 1021 is disposed around a rotor 1032 described later.
  • the stator 1021 has a plurality of core pieces 1060, a plurality of insulators 1070, and a plurality of coils 1080.
  • the plurality of core pieces 1060 are annularly arranged around the central axis 1009.
  • Each core piece 1060 includes a core back 1061 extending in the circumferential direction and a tooth 1062 protruding from the core back 1061 toward the radially inner side.
  • An insulator 1070 is attached to each core piece 1060.
  • Coil 1080 is formed of a conductive wire wound around tooth 1062 via insulator 1070. A more detailed structure of the stator 1021 will be described later.
  • the motor cover 1022 is a resin member that holds the stator 1021.
  • the motor cover 1022 includes an upper plate portion 1221, a side plate portion 1222, a first fixing portion 1223, a second fixing portion 1224, and at least one bottom plate fixing portion 1225.
  • the upper plate portion 1221 is a plate-like portion that extends substantially perpendicular to the central axis 1009 above the stator 1021.
  • a through hole is formed in the approximate center of the upper plate portion 1221.
  • An upper bearing 1025 is held in the through hole of the upper plate portion 1221.
  • the side plate portion 1222 has a substantially cylindrical shape and extends from the outer edge of the upper plate portion 1221 downward in the axial direction.
  • the bottom plate fixing portion 1225 protrudes radially outward from the vicinity of the lower end portion of the side plate portion 1222.
  • the bottom plate fixing portion 1225 is formed with at least one screw hole.
  • the bottom plate 1023 is fixed to the bottom plate fixing portion 1225 by screwing.
  • the bottom plate fixing portions 1225 are provided at three locations in the circumferential direction.
  • the number of fixing points between the motor cover 1022 and the bottom plate 1023 is not limited to three, and may be two or four or more.
  • the motor cover 1022 and the bottom plate 1023 may be fixed by other methods such as adhesion or caulking.
  • fixed part 1224 is mentioned later.
  • the bottom plate 1023 is a member that covers at least a part of the opening below the motor cover 1022.
  • the bottom plate 1023 extends substantially perpendicular to the central axis 1009.
  • a recess is formed in the center of the bottom plate 1023.
  • a lower bearing 1026 is held in the recess of the bottom plate 1023.
  • Stator 1021, circuit board 1024, upper bearing 1025, lower bearing 1026, and rotor 1032 are housed in a housing constituted by motor cover 1022 and bottom plate 1023.
  • the circuit board 1024 has a substantially plate shape.
  • the circuit board 1024 is disposed substantially perpendicular to the central axis 1009 below the stator 1021.
  • On the circuit board 1024 electronic components constituting an electric circuit for supplying a drive current to the coil 1080 are mounted. An end portion of the conductive wire constituting the coil 1080 is electrically connected to an electric circuit on the circuit board 1024.
  • the upper bearing 1025 supports the shaft 1031 to be rotatable with respect to the motor cover 1022.
  • the lower bearing 1026 supports the shaft 1031 to be rotatable with respect to the bottom plate 1023.
  • the upper bearing 1025 and the lower bearing 1026 for example, ball bearings in which spherical rolling elements are interposed between the inner ring and the outer ring are used.
  • an elastic member 1027 is interposed between the motor cover 1022 and the upper bearing 1025. Thereby, the vibration at the time of rotation of the motor 1011 and the impeller 1012 is reduced.
  • types of bearings other than ball bearings may be used as the upper bearing 1025 and the lower bearing 1026.
  • the shaft 1031 is disposed along a central axis 1009 extending vertically. More specifically, the shaft 10031 is a columnar member disposed along the central axis 1009. The shaft 1031 is supported by the upper bearing 1025 and the lower bearing 1026 and can rotate around the central axis 1009. The upper end portion of the shaft 1031 protrudes upward from the motor cover 1022.
  • An impeller 1012 is fixed to the upper end portion of the shaft 1031. In this modification, the impeller 1012 is directly fixed to the shaft 1031. However, the impeller 1012 is indirectly connected to the shaft 1031 via another member such as a cylindrical member made of a resin material or a metal material. It may be fixed to.
  • the rotor 1032 is fixed to the shaft 1031 and rotates around the central axis 1009 together with the shaft 1031.
  • the rotor 1032 of this modification example is made of magnet resin formed in a substantially cylindrical shape.
  • N poles and S poles are alternately magnetized in the circumferential direction.
  • the outer peripheral surface of the rotor 1032 faces the end surface on the radially inner side of the tooth 1062 in the radial direction with a slight gap therebetween. That is, the rotor 1032 has a magnetic pole surface that faces the stator 1021 in the radial direction.
  • a rotor 1032 made of a magnet resin is used.
  • the rotor 1032 may be configured by fixing a plurality of magnets on the outer peripheral surface or inside of a cylindrical rotor core that is a magnetic body. Good.
  • the impeller 1012 is a so-called turbo type centrifugal impeller.
  • the impeller 1012 is disposed above the motor cover 1022 of the motor 1011. As shown in FIG. 1, the impeller 1012 includes an upper shroud 1051, a lower shroud 1052, and a plurality of blades 1053.
  • the upper shroud 1051 has a cylindrical portion 1511, a skirt portion 1512, and an intake hole 1513.
  • the upper shroud 1051 is disposed above the lower shroud 1052 and the plurality of blades 1053.
  • the cylindrical portion 1511 is a substantially cylindrical portion with the central axis 1009 as the center.
  • the cylindrical portion 1511 of this modification has a substantially constant diameter regardless of the position in the axial direction.
  • the cylindrical portion 1511 may have a shape that gradually increases in diameter as it goes downward in the axial direction.
  • the skirt portion 1512 extends radially outward from the lower end portion of the tube portion 1511.
  • the radial position of the outer edge of the skirt 1512 is substantially the same as the radial position of the outer edge of the lower shroud 1052.
  • the intake hole 1513 is disposed at the center of the upper shroud 1051.
  • the intake hole 1513 is formed by the cylinder portion 1511 and penetrates the upper shroud 1051 in the axial direction on the radially inner side of the cylinder portion 1511.
  • the lower shroud 1052 is a plate-like portion that extends substantially perpendicular to the central axis 1009 above the motor cover 1022.
  • the lower surface of the lower shroud 1052 faces the upper surface of the motor cover 1022 in the axial direction.
  • the lower shroud 1052 has its radially inner end fixed to the shaft 1031 of the motor 1011.
  • the blade 1053 is disposed between the upper shroud 1051 and the lower shroud 1052.
  • the plurality of blades 1053 are arranged at substantially equal intervals in the circumferential direction.
  • the upper casing 1133 has a top plate portion 1131 and a wall portion 1132.
  • the top plate portion 1131 is disposed above the impeller 1012 and extends in an annular shape along the upper surface of the upper shroud 1051.
  • the top plate portion 1131 has a central hole 1130 at the center thereof.
  • the central hole 1130 is connected to the intake hole 1513 described above.
  • the wall portion 1132 extends in a cylindrical shape downward from the top plate portion 1131 on the radially outer side of the motor 1011. At least the upper end of the motor 1011 and the impeller 1012 are accommodated inside the wall portion 1132 in the radial direction. That is, the wall portion 1132 surrounds at least a part of the motor 1011.
  • the inner surface of the wall portion 1132 faces at least a part of the motor 1011 in the radial direction.
  • the blower casing 1013 of this modification is formed from three annular members, an upper casing 1133, a central casing 1134, and a lower casing 1135.
  • the central casing 1134 is disposed below the upper casing 1133.
  • the lower casing 1135 is disposed below the central casing 1134.
  • Upper casing 1133 includes the top plate portion 1131 and the upper end of wall portion 1132.
  • the central casing 1134 and the lower casing 1135 are cylindrical members that form the wall portion 1132.
  • the blower casing 1013 of this modification is formed from three members, the blower casing 1013 may be formed from one member, or may be formed from two or four or more members. That is, the blower casing 1013 is formed from at least one member.
  • the outer peripheral surface of the motor cover 1022 and the inner peripheral surface of the wall portion 1132 of the blower casing 1013 are arranged with a gap in the radial direction.
  • a space between the outer peripheral surface of the motor cover 1022 and the inner peripheral surface of the wall portion 1132 serves as a gas flow path 1010 when the centrifugal blower 1001 is driven.
  • At least a part of the channel 1010 is connected to an exhaust hole of the wall portion 1132.
  • a communication hole 1100 that connects the outside and the inside of the motor cover 1022 is formed in the motor cover 1022 below the space or in the axial direction of the space.
  • the communication hole 1100 is connected to a gap (flow path) 1090. Communicate.
  • the gap 1090 is substantially triangular or trapezoidal in plan view.
  • the gap 1090 is located on the radially inner side of the core back 1061.
  • the gap 1090 opens at an upper opening 1090a located above the core back 1061 and a lower opening 1090b located below the core back 1061.
  • the upper opening 1090a opens upward in the axial direction.
  • the lower opening 1090b opens toward the lower side in the axial direction. Thereby, air can be efficiently guided from the upper opening 1090a toward the lower opening 1090b.
  • the gap 1090 has a smaller width in the circumferential direction as it goes inward in the radial direction.
  • the gap 1090 may be connected not only to the communication hole 1100 but also to a through-hole 1221 a that penetrates in the vertical direction provided in the upper plate portion 1221 of the motor cover 1022. In this case, the flow of exhaust gas passing through the gap 1090 becomes smooth, and exhaust efficiency can be improved.
  • the gas discharged to the radially outer side of the impeller 1012 hits the wall portion 1132 of the upper casing 1133 and changes its direction downward and radially inward, so that the outer peripheral surface and the wall of the motor cover 1022 It proceeds downward in the axial direction through the flow path 1010 formed between the inner peripheral surface of the portion 1132 and the gap 1090 of the stator 1021. Then, the airflow is discharged from the lower end portion of the flow path 1010 to the outside of the centrifugal blower 1001 through the exhaust hole.
  • FIG. 18 is a top view of the stator 1021.
  • the stator 1021 according to this modification includes three core pieces 1060, three insulators 1070, and three coils 1080. With this configuration, the number of energizations of the windings per rotation can be reduced, so that the motor can be driven at high speed.
  • the stator may be constituted by one core piece.
  • the insulator 1070 has a tooth insulating portion 1071, an inner wall portion 1072, and an outer wall portion 1073, respectively.
  • FIG. 19 is a top view of the core piece 1060.
  • the plurality of core pieces 1060 are made of a magnetic material and are arranged in the circumferential direction.
  • the core piece 1060 for example, a laminated steel plate in which electromagnetic steel plates that are magnetic bodies are laminated in the axial direction is used.
  • the core piece 1060 includes a core back (core back portion) 1061 and a tooth (tooth portion) 1062.
  • the core back 1061 extends in the circumferential direction on the radially outer side than the teeth 1062.
  • the shape of the core back 1061 in a top view does not necessarily need to be an arc shape, and may be generally extended in the circumferential direction as a whole.
  • the teeth 1062 protrude from the center in the circumferential direction of the core back 1061 toward the inside in the radial direction.
  • the core back 1061 of this modification has a central core back portion 1611 and a pair of connected core back portions 1612.
  • the center core back portion 1611 extends substantially perpendicular to the teeth 1062 extending in the radial direction. Further, the central core back portion 1611 extends from the radially outer end of the teeth 1062 toward both sides in the circumferential direction.
  • the pair of connection core back portions 1612 are located on both sides of the central core back portion 1611 in the circumferential direction. Each connecting core back portion 1612 extends from the end portion in the circumferential direction of the central core back portion 1611 while being bent in a direction approaching the teeth 1062.
  • one tooth 1062 is provided for each of the three core pieces 1060.
  • the number of teeth 1062 which the stator 1021 has is the minimum three as a three-phase synchronous motor. If the number of teeth 1062 is reduced, the number of times of switching per rotation of the motor drive circuit during driving can be reduced. Therefore, it becomes easy to make the motor 1011 correspond to the high speed.
  • the three core pieces 1060 are arranged in the circumferential direction.
  • the core backs 1061 of the three core pieces 1060 are connected in an annular shape. Specifically, the ends of the connecting core back portions 1612 of the adjacent core pieces 1060 are connected to each other.
  • the joint of the core piece 1060 is fixed by welding, for example.
  • the core back 1061 of each core piece 1060 is provided with a fixing hole 1063 penetrating in the axial direction. That is, in this modification, all the core pieces 1060 each have the fixing hole 1063. With this configuration, all the core pieces 1060 can be firmly fixed to the motor cover 1022 when the centrifugal blower 1001 is assembled.
  • the fixing hole 1063 is located outside the teeth 1062 in the radial direction. The vicinity of the center in the circumferential direction of the core back 1061 is a place where the magnetic flux density when the motor 1011 is driven is low and the role as a magnetic path is small. By providing the fixed hole 1063 at the location, the narrowing of the magnetic path by the fixed hole 1063 is suppressed.
  • the motor cover 1022 and the core piece 1060 are fixed by a fixing member inserted into the fixing hole 1063.
  • the motor cover 1022 has three first fixing portions 1223 and three second fixing portions 1224.
  • Each of the three first fixing portions 1223 protrudes radially inward from the side plate portion 1222 above the fixing hole 1063 described above.
  • the second fixing portion 1224 protrudes radially inward from the side plate portion 1222 below the fixing hole 1063 described above.
  • the first fixing portion 1223 and the second fixing portion 1224 are each provided with a screw hole extending in the axial direction.
  • screws 1043 that are fixing members are inserted into the screw holes of the second fixing portion 1224, the fixing holes 1063, and the screw holes of the first fixing portion 1223 at three locations in the circumferential direction. Thereby, the stator 1021 and the motor cover 1022 are fixed. With this configuration, the motor cover 1022 and the core piece 1060 can be firmly fixed.
  • the number of fixing points between the stator 1021 and the motor cover 1022 is not necessarily three.
  • the fixing hole 1063 may be provided in only one or two of the three core pieces 1060.
  • Each core piece 1060 may be provided with two or more fixing holes 1063.
  • the stator 1021 and the motor cover 1022 may be fixed by a method other than screwing.
  • the stator 1021 and the motor cover 1022 may be fixed by resin-molding the motor cover 1022 using the stator 1021 as an insert part.
  • the outer periphery of the coil 1080 is covered with a covering portion (flow path forming member) 1081.
  • the covering portion 1081 is a resin.
  • the coil 1080 is wound around the teeth 1062 of the stator 1021, and the coil 1080 is covered with the covering portion 1081, thereby ensuring insulation of the coil 1080 and reducing vibration and noise.
  • the core piece 1060 in the modified example is laminated with thin laminated steel plates to reduce eddy currents during high-speed rotation, but the strength of these laminated steel plates is ensured by covering the coil 1080 with the covering portion 1081. can do.
  • an air gap 1090 is formed between the covering portion 1081 that covers one coil 1080 and the covering portion 1081 that covers another adjacent coil 1080. That is, the covering part 1081 constitutes the gap 1090.
  • an air flow path can be provided between adjacent teeth 1062, the stator 1021 can be cooled by the air flowing through the flow path, and the air flow characteristics of the centrifugal fan can also be satisfied.
  • the covering portion 1081 has a configuration in which a part of the insulator 1070 or the coil 1080 on one side in the circumferential direction and a part of the insulator 1070 or the coil 1080 on the other side in the circumferential direction are brought into contact with each other. Also good.
  • the surface area of the covering portion 1081 exposed in the gap 1090 can be increased, and the coil can be efficiently cooled via the covering portion 1081.
  • the three core pieces 1060 are employed and the centrifugal blower is described as an example. Therefore, compared to, for example, six core pieces, it is easy to secure the interval between adjacent teeth, and the stator can be easily cooled. .
  • the circumferential distance between one covering portion 1081 and the other covering portion 1081 is longer on the upper side in the axial direction than the center in the axial direction of the teeth 1062, and is lower in the axial direction than the center in the axial direction of the teeth 1062. The side is longer. Thereby, the static pressure of the centrifugal blower 1001 can be further increased.
  • the covering portion 1081 is formed by molding.
  • FIG. 20 shows a centrifugal blower 1001A used for a stick-type or handy-type cleaner. Also in the centrifugal fan 1001A, the same stator 1021 as in the above modification is used, and the same operational effects can be achieved. As described above, the present invention can be applied even to a centrifugal blower that blows air to a channel having a smaller diameter.
  • a structure equivalent to the above-described modification may be applied to a motor used for a purpose other than a vacuum cleaner.
  • FIG. 21 is a perspective view of the cleaner 100 having the air blower 1 described in the present embodiment.
  • the vacuum cleaner 100 includes the above-described embodiment and the air blowing device of the modification. Thereby, while efficiently cooling the air blower 1 mounted in the cleaner 100, exhaust efficiency can be improved.
  • the air blower of embodiment and a modification can be mounted not only in the cleaner 100 but in another electric equipment.
  • flow path forming member hollow member (flow path forming member), 1001 ... centrifugal blower (blower device), 1009, J ... central axis, 1010 ... flow path, 1030 ... rotating part (rotor), 1061 ... core back (core back part), 1062 ... teeth (teeth part) , 1070 ... insulator, 1081 ... covering portion (flow path forming member), 1090 ... gap (flow path), 1135 ... lower casing (housing)

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Un exemple de mode de réalisation de la présente invention concerne un dispositif de soufflage, lequel dispositif comporte : un rotor comprenant un arbre qui s'étend verticalement ; un stator disposé sur le côté radialement externe du rotor ; un boîtier cylindrique qui reçoit le rotor et le stator et qui s'étend dans une direction axiale ; et une hélice qui est fixée à un arbre, au-dessus du stator. Le stator comprend : une partie arrière de noyau annulaire ; une pluralité de parties de dent qui s'étendent radialement vers l'intérieur à partir de la partie arrière de noyau ; un isolateur qui recouvre au moins une partie des parties de dents ; des enroulements qui sont enroulés autour de chacune des parties de dent, avec l'interposition de l'isolateur ; et un élément de formation de trajectoire d'écoulement dont au moins une partie est disposée radialement à l'intérieur de la partie arrière de noyau. Le boîtier comprend des trous traversants qui s'ouvrent sur l'intérieur du boîtier, et l'élément de formation de trajectoire d'écoulement relie entre eux l'un ou l'autre de l'isolateur ou d'une partie de l'enroulement sur un côté dans la direction périphérique à l'isolateur ou à une partie de l'enroulement sur l'autre côté dans la direction périphérique, pour former une trajectoire d'écoulement qui passe sur le côté radialement intérieur de la partie arrière de noyau. La trajectoire d'écoulement est reliée aux trous traversants dans le boîtier.
PCT/JP2015/080702 2015-05-25 2015-10-30 Dispositif de soufflage et dispositif de nettoyage WO2016189763A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15893395.2A EP3306105A4 (fr) 2015-05-25 2015-10-30 Dispositif de soufflage et dispositif de nettoyage
JP2017520203A JPWO2016189763A1 (ja) 2015-05-25 2015-10-30 送風装置および掃除機
US15/576,338 US20180163747A1 (en) 2015-05-25 2015-10-30 Blower and vacuum cleaner
CN201580080499.4A CN107614891B (zh) 2015-05-25 2015-10-30 送风装置以及吸尘器

Applications Claiming Priority (6)

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JP2015-105924 2015-05-25
JP2015105924 2015-05-25
US201562168165P 2015-05-29 2015-05-29
US62/168165 2015-05-29
US201562185854P 2015-06-29 2015-06-29
US62/185854 2015-06-29

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EP (1) EP3306105A4 (fr)
JP (1) JPWO2016189763A1 (fr)
CN (1) CN107614891B (fr)
WO (1) WO2016189763A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
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EP3376053A1 (fr) * 2017-03-17 2018-09-19 Nidec Corporation Soufflante et aspirateur
EP3376054A1 (fr) * 2017-03-17 2018-09-19 Nidec Corporation Soufflante électrique et aspirateur
EP3462581A1 (fr) * 2017-09-29 2019-04-03 Nidec Corporation Moteur, dispositif de soufflage et aspirateur
JPWO2019167155A1 (ja) * 2018-02-28 2020-09-17 三菱電機株式会社 電動送風機、電気掃除機および手乾燥装置
WO2020195394A1 (fr) * 2019-03-28 2020-10-01 日本電産株式会社 Moteur
CN111886414A (zh) * 2018-02-28 2020-11-03 三菱电机株式会社 电动鼓风机、电动吸尘器及干手装置
WO2022059363A1 (fr) * 2020-09-18 2022-03-24 日本電産コパル電子株式会社 Structure d'attache de moteur et procédé d'attache de moteur

Families Citing this family (16)

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Publication number Priority date Publication date Assignee Title
EP3015713A1 (fr) * 2014-10-30 2016-05-04 Nidec Corporation Appareil de soufflage
WO2016194256A1 (fr) * 2015-05-29 2016-12-08 日本電産株式会社 Dispositif de soufflante, et aspirateur
EP3252931A1 (fr) * 2016-05-30 2017-12-06 HILTI Aktiengesellschaft Flasque pour moteur électrique sans balais
US11193493B2 (en) * 2016-07-04 2021-12-07 Amotech Co., Ltd. Water pump
US10641282B2 (en) * 2016-12-28 2020-05-05 Nidec Corporation Fan device and vacuum cleaner including the same
CN110999044B (zh) * 2017-08-01 2022-04-08 三菱电机株式会社 旋转驱动装置、轴流送风器、组装方法、激光振荡装置
US11104202B2 (en) 2018-10-18 2021-08-31 Denso International America, Inc. Vehicle HVAC airflow system
JP2020193602A (ja) * 2019-05-29 2020-12-03 日本電産株式会社 送風装置、および掃除機
KR102244842B1 (ko) * 2019-09-03 2021-04-26 엘지전자 주식회사 모터 구동 장치 및 이를 구비하는 청소기
CN110454416A (zh) * 2019-09-04 2019-11-15 小狗电器互联网科技（北京）股份有限公司 一种风机及吸尘器
CN112524090B (zh) * 2019-09-19 2022-09-20 日本电产株式会社 送风装置和机电设备
CN111064302A (zh) * 2020-01-06 2020-04-24 苏州永捷电机有限公司 一种吸尘器用串激电机
JP6960004B2 (ja) * 2020-02-18 2021-11-05 シナノケンシ株式会社 送風機
EP3933207A1 (fr) * 2020-06-29 2022-01-05 Dürr Dental SE Ventilateur médical avec système d'isolation acoustique, en particulier pour usage dentaire
EP4371218A1 (fr) * 2021-07-13 2024-05-22 Dyson Technology Limited Moteur sans balais
WO2023285810A1 (fr) * 2021-07-13 2023-01-19 Dyson Technology Limited Moteur sans balais

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11159497A (ja) * 1997-11-25 1999-06-15 Toshiba Tec Corp 電動送風機
JP2012202283A (ja) * 2011-03-25 2012-10-22 Panasonic Corp 電動送風機およびそれを用いた電気掃除機
JP2014092118A (ja) * 2012-11-06 2014-05-19 Panasonic Corp ポンプ

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57108498A (en) * 1980-12-26 1982-07-06 Toshiba Corp Electric motor driven blower
JPH04276198A (ja) * 1991-03-05 1992-10-01 Sanyo Electric Co Ltd 電動送風機
SE9303599L (sv) * 1993-11-02 1995-05-03 Electrolux Ab Anordning för att kyla ett elmotordrivet turbofläktaggregat
JPH11125197A (ja) * 1997-10-22 1999-05-11 Matsushita Electric Ind Co Ltd 電動送風機
JPH11148484A (ja) * 1997-11-19 1999-06-02 Toshiba Tec Corp 電動送風機
JP4821048B2 (ja) * 2001-02-05 2011-11-24 パナソニック株式会社 電動機
CN1223306C (zh) * 2002-05-31 2005-10-19 乐金电子(天津)电器有限公司 吸尘器用离心送风装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11159497A (ja) * 1997-11-25 1999-06-15 Toshiba Tec Corp 電動送風機
JP2012202283A (ja) * 2011-03-25 2012-10-22 Panasonic Corp 電動送風機およびそれを用いた電気掃除機
JP2014092118A (ja) * 2012-11-06 2014-05-19 Panasonic Corp ポンプ

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3306105A4 *

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3376053A1 (fr) * 2017-03-17 2018-09-19 Nidec Corporation Soufflante et aspirateur
EP3376054A1 (fr) * 2017-03-17 2018-09-19 Nidec Corporation Soufflante électrique et aspirateur
CN108626145A (zh) * 2017-03-17 2018-10-09 日本电产株式会社 送风装置以及吸尘器
CN108626146A (zh) * 2017-03-17 2018-10-09 日本电产株式会社 送风装置以及吸尘器
EP3462581A1 (fr) * 2017-09-29 2019-04-03 Nidec Corporation Moteur, dispositif de soufflage et aspirateur
CN111886414A (zh) * 2018-02-28 2020-11-03 三菱电机株式会社 电动鼓风机、电动吸尘器及干手装置
CN111742148A (zh) * 2018-02-28 2020-10-02 三菱电机株式会社 电动鼓风机、电动吸尘器以及手干燥装置
JPWO2019167155A1 (ja) * 2018-02-28 2020-09-17 三菱電機株式会社 電動送風機、電気掃除機および手乾燥装置
EP3760877A4 (fr) * 2018-02-28 2021-03-03 Mitsubishi Electric Corporation Soufflante électrique, aspirateur électrique et sèche-mains
EP3760878A4 (fr) * 2018-02-28 2021-03-03 Mitsubishi Electric Corporation Soufflante électrique, aspirateur électrique, et sèche-mains
JP2021170931A (ja) * 2018-02-28 2021-10-28 三菱電機株式会社 電動送風機、電気掃除機および手乾燥装置
CN111742148B (zh) * 2018-02-28 2022-02-22 三菱电机株式会社 电动鼓风机、电动吸尘器以及手干燥装置
US11268532B2 (en) 2018-02-28 2022-03-08 Mitsubishi Electric Corporation Electric blower, electric vacuum cleaner, and hand dryer
CN111886414B (zh) * 2018-02-28 2022-07-26 三菱电机株式会社 电动鼓风机、电动吸尘器及干手装置
JP7134309B2 (ja) 2018-02-28 2022-09-09 三菱電機株式会社 電動送風機、電気掃除機および手乾燥装置
WO2020195394A1 (fr) * 2019-03-28 2020-10-01 日本電産株式会社 Moteur
WO2022059363A1 (fr) * 2020-09-18 2022-03-24 日本電産コパル電子株式会社 Structure d'attache de moteur et procédé d'attache de moteur

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US20180163747A1 (en) 2018-06-14
EP3306105A4 (fr) 2019-02-27
CN107614891A (zh) 2018-01-19
CN107614891B (zh) 2019-03-15
JPWO2016189763A1 (ja) 2018-03-08

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